Answer this question truthfully
### Question: What causes Choriocarcinoma?
### Response: Choriocarcinoma is an uncommon, but very often curable cancer associated with pregnancy.
A baby may or may not develop in these types of pregnancy.
The cancer may develop after a normal pregnancy; however, it is most often associated with a complete hydatidiform mole.
The abnormal tissue from the mole can continue to grow even after it is removed and can turn into cancer.
About half of all women with a choriocarcinoma had a hydatidiform mole, or molar pregnancy.
Choriocarcinomas may also occur after an abortion, ectopic pregnancy, or genital tumor.